Putting all the noise aside from the twitterati and whoever else has chimed in on some form of social media, whether we do or do not move to the B-12 will come down to what the P-12 schools do.
The B-12 has made far too much noise to do nothing but they also cannot add an odd number of schools. It appears that Colorado wants to return. There have been conflicting reports about Arizona (all over the map in reality) and ASU (more say no than yes) while most reports on Utah are that they will remain in the P-12.
If one or three P-12 schools leave for the B-12, we will also join (the yes will be issued within seconds of the ask). If two or four P-12 schools join, we're not getting invited.